HMRC Time to Pay Arrangements: Spreading a Self Assessment Bill in 2026/27
How to set up a Time to Pay arrangement with HMRC for a Self Assessment tax bill in 2026/27, what interest applies, and when the online payment plan tool can and can't be used.
Quick answer
A Time to Pay arrangement is HMRC's formal instalment plan for anyone who can't pay a Self Assessment (or other tax) bill in full by the deadline. Rather than ignoring the bill and risking escalating penalties and enforcement action, agreeing a realistic instalment plan — ideally before or shortly after the payment deadline — keeps the debt manageable and demonstrates good faith to HMRC.
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Self-employed tax calculatorSetting it up online versus by phone
For many Self Assessment balances within a set threshold, and set up within a limited window after the payment deadline, HMRC's online payment plan tool allows a self-serve Time to Pay arrangement to be created without needing to speak to an adviser — selecting a monthly instalment amount and having it collected automatically. Larger debts, more complex situations, or requests made well outside the standard window generally need to go through HMRC's Self Assessment Payment Support Service by phone instead, where an adviser will assess affordability based on income and outgoings.
uk-hmrc-time-to-pay-arrangement-guide-2026Interest doesn't stop, even with an agreed plan
It's a common misconception that agreeing a Time to Pay plan pauses the cost of being late. In reality, HMRC's standard late payment interest continues to accrue on the outstanding balance throughout the life of the arrangement — the main practical benefit of the arrangement is generally avoiding or reducing the separate late payment penalty (and avoiding more severe debt enforcement action), not avoiding interest altogether. Paying off the balance faster than the minimum agreed instalments, where affordable, reduces the total interest paid.
What happens if a payment is missed
Missing an agreed instalment without contacting HMRC can result in the entire arrangement being cancelled, with the full remaining balance becoming due immediately, alongside any penalties that a working arrangement had been holding off. Anyone who realises in advance that a specific instalment will be difficult to make should contact HMRC proactively to discuss adjusting the plan, rather than simply missing the payment and hoping it goes unnoticed.
The wider financial picture
A Time to Pay arrangement itself generally isn't reported to consumer credit reference agencies the way a personal loan would be, so it shouldn't directly show up on a standard credit report. That said, unresolved tax debt that escalates beyond a Time to Pay arrangement — for example, to formal debt collection or enforcement action — can have its own separate financial consequences, which is a further reason to engage with HMRC early rather than let a bill drift into arrears untouched.
Bottom line
If a Self Assessment bill can't be paid in full on time, contacting HMRC (or using the online tool where eligible) before or shortly after the deadline to agree a realistic Time to Pay plan is almost always better than missing the deadline silently — interest will still apply, but penalties and more serious enforcement action are far more likely to be avoided.
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Frequently asked questions
What is a Time to Pay arrangement?
A Time to Pay arrangement is a formal agreement with HMRC to pay a tax debt in instalments over an agreed period, rather than as a single lump sum by the normal deadline, used when someone can't pay their Self Assessment bill in full on time.
Can I set up a Time to Pay plan online without calling HMRC?
Yes, for many Self Assessment debts up to a certain threshold and within a set time after the payment deadline, HMRC's online 'Pay your Self Assessment tax bill' or payment plan tool allows a self-serve instalment arrangement to be set up without speaking to an adviser.
Does interest still apply on a Time to Pay arrangement?
Yes — interest continues to accrue on the outstanding balance at HMRC's standard late payment interest rate throughout the arrangement, even though the late payment penalty itself may be avoided or reduced by having the arrangement in place before it would otherwise be charged.
What happens if a Time to Pay instalment is missed?
Missing an agreed instalment can cause HMRC to cancel the arrangement and demand the full outstanding balance immediately, along with any penalties that would otherwise have applied, so keeping to the agreed schedule (or contacting HMRC proactively if a payment will be missed) is important.
Does having a Time to Pay arrangement affect my credit score?
A Time to Pay arrangement with HMRC is not typically reported to consumer credit reference agencies in the way a personal loan or credit card would be, but unpaid tax debt that escalates to enforcement action can have other financial consequences.
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